Concept:A standard of deferred payment means money is used to settle debts or payments at a future date.
Explanation:For money to serve as a standard of deferred payment, it must hold its purchasing power over time.
Creditors and debtors need confidence that the money they lend or repay later will not lose its value.
If money is not stable in value, the amount received in the future may buy far less than the amount lent today.
Durability and homogeneity are useful for physical handling, but stability in value is essential for future payments.
Therefore, money must be stable in value, not in terms of physical form, but in terms of its purchasing power.
Answer:D. stable in value